Every executive, manager and player knows injuries are just another part of spring training.

The executives and managers hope the injuries aren’t too significant or that they don’t take out any of their impact players. Players mostly just hope the injuries don’t happen to them.

A decent amount of players already and been sidelined this spring, including pretty big names with matching expectations.

Curtis Granderson, New York Yankees

This is the most damaging injury of spring training so far, and it’s not even close. The Yankee outfielder was hit with a pitch on the right forearm in his first plate appearance of the spring Sunday, fracturing it and keeping him on the shelf for about 10 weeks. That means the Yankees will be without yet another power source until at least early May.

Granderson led the team with 43 home runs and 106 RBI last season. In 2011, he hit 41 and drove in a league-leading 119.

The Yankees already are without Alex Rodriguez for the first half of the season (and possibly for the entire year), and Nick Swisher departed via free agency in the offseason. With Mark Teixeira declining in the power category, Granderson going down further cripples what was one of the team’s strengths for several years.

The Yankees say Granderson’s replacement will come from within the organization because Granderson is expected to miss only about 30 games.

Corey Hart and Mat Gamel, Milwaukee Brewers

Hart took most of his at-bats as a first baseman last season, but this year the team was toying with the idea of moving him back to right field and putting Gamel in at first. Gamel was finally healthy and looked ready to hit consistently at the major league level. But those plans are all screwed up now.

Hart had surgery on his right knee because it continued to swell up. The Brewers called it a clean-up procedure, but the fact that Hart still can’t put any weight on the leg says it was either more serious than that or the team is being extra cautious. The goal for Hart is to return before the start of May, but that is up in the air for a guy who has averaged 29 home runs over the last three seasons.

Gamel has had a troubled career to this point in terms of injuries and the team not believing he was mature enough to handle the big leagues. Finally, after a couple positions changes and at age of 27, the Brewers were handing a starting job to Gamel.

Gamel could have gotten significant playing time last year but he tore his right ACL on May 1 and missed the rest of the season. Well, it happened again this spring before games even started and Gamel will miss the entire season.

He is another lost power source for the Brewers, and having he and Hart on the disabled list at the same time could be costly in the standings.

Johan Santana, New York Mets

Santana missed the entire 2011 season and made 21 starts last year before finishing it on the DL with lower-back inflammation. Now the Mets have pushed back Santana’s first spring start from March 2 to the March 10-15 range because the team wants him to build strength in his left shoulder.

Phil Hughes, New York Yankees

The Yankees are trying to be optimistic, but an MRI last week revealed Hughes has a bulging disc in his upper back. The Yankees are giving the righthander a “two-week timeout” and hopefully nothing more, but GM Brian Cashman and manager Joe Girardi also noted that back injuries can be difficult to manage.

If this back problem lingers into the regular season, the Yankees’ rotation will start another season down a man expected to contribute significantly. Last year it was Michael Pineda, who missed the entire year after shoulder surgery.

The Yankees already have issues with their aging, declining and injured offense. The last thing they need now is for the rotation to come up short. If Hughes, or any of the team’s starters, goes down for significant time, the Yankees will have to scramble to replace him and keep up in the division once the regular season starts.

Didi Gregorius, Arizona Diamondbacks

Gregorius is a shortstop prospect expected to get the opening day job for the Diamondbacks, and while he isn’t seen as an immediate impact kind of player, at least not with the bat, his elbow injury is significant because he was the main piece for the team in the deal that sent top pitching prospect Trevor Bauer to Cleveland in a three-team trade this past offseason.

The right elbow started hurting Gregorius in January and he’s since been shutdown by the Diamondbacks. No surgery is required but Gregorius could miss the early part of the regular season.

This will be a closely followed injury since the Diamondbacks were widely criticized for not getting enough back for Bauer, who was the third overall pick in the 2011 draft.